A detailed cable laying plan would be developed which incorporates a cable burial risk assessment to ascertain burial depths and cable laying techniques in accordance with the draft DCO and with the objective of achieving optimum cable burial and thereby minimising the lengths of remaining unburied cable that would require protection.
417. It is agreed that EATL would adopt a hierarchical approach to cable protection options in the event that full burial of the entire lengths of the export cables cannot be achieved. Under this approach, protection options would be assessed using a number of criteria, including the aim of selecting protection methods which would cause least disturbance to sensitive receptors.
418. If 100% burial is achieved, for example, then there would be no impact in bedload sediment transport anywhere within the offshore cable corridor and hence no cumulative impact arising from the proposed projects.
7.8 Transboundary Impacts
419. The predicted changes to the baseline physical environment are not anticipated to be of sufficient magnitude or cover a sufficient geographical extent to impact upon the identified marine geology, oceanography and physical processes receptor groups located within other EU member states.
420. This finding is supported by the assessments that have been made in the East Anglia ZEA (ABPmer 2012a) and the ES of the proposed East Anglia ONE project (ABPmer 2012b).
7.9 Inter-relationships
421. The construction, operation and decommissioning phases of the proposed East Anglia THREE project would cause a range of effects on the marine geology, oceanography and physical processes. The magnitude of these effects has been assessed using expert assessment, drawing from a wide science base that includes project-specific surveys and previous numericalmodelling activities.
422. These effects not only have the potential to directly affect the identified marine geology, oceanography and physical processes receptors but may also manifest as impacts upon receptors other than those considered within the context of marine geology, oceanography and physical processes. The assessments of significance of these impacts on other receptors are provided in the chapters listed in Table 7.37.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm Chapter 7 Marine Geology, Oceanography and Physical Processes Page 81
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